The goddess Ma'at was the goddess of harmony, order, and truth represented as a young woman, sitting or standing, holding a scepter in one hand and an ankh in the other. Sometimes she is depicted with wings on each arm or as a woman with an ostrich feather on her head. Because it also was the pharaoh's duty to ensure truth and justice, many of them were referred to as Meri-Ma'at (Beloved of Ma'at). Since she was considered as merely the concept of order and truth, it was thought that she came into existence at the moment of creation, having no creator and made the order of the entire universe from the pandemonium. When beliefs about Thoth arose in the Egyptian pantheon and started to consume the earlier beliefs at Hermopolis about the Ogdoad, it was said that she was the mother of the Ogdoad and Thoth the father. In Duat, the Egyptian underworld, the hearts of the dead were said to be weighed against her single Shu feather, symbolically representing the concept of Ma'at, in the Hall of Two Truths. A heart which was unworthy was devoured by the goddess Ammit and its owner condemned to remain in Duat. The heart was considered the location of the soul by ancient Egyptians. Those people with good, (and pure), hearts were sent on to Aaru. Osiris came to be seen as the guardian of the gates of Aaru after he became part of the Egyptian pantheon and displaced Anubis in the Ogdoad tradition.